/***************************************************************************
 *   Copyright (c) Jürgen Riegel          (juergen.riegel@web.de) 2008     *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  is distributed in the hope that it will be useful,      *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/


#ifndef SKETCHER_CONSTRAINT_H
#define SKETCHER_CONSTRAINT_H


#include <Base/Persistence.h>

namespace Sketcher
{

enum ConstraintType {
    None,
    Coincident,
    Horizontal,
    Vertical,
    Parallel,
    Tangent,
    Distance,
    DistanceX,
    DistanceY,
    Angle,
    Perpendicular,
    Radius,
    Equal,
    PointOnObject,
    Symmetric
};

/// define if you want to use the end or start point
enum PointPos { none, start, end, mid };

class SketcherExport Constraint : public Base::Persistence
{
    TYPESYSTEM_HEADER();

public:
    ~Constraint();
    Constraint();
    Constraint(const Constraint&);
    virtual Constraint *clone(void) const;

    static const int GeoUndef;

    // from base class
    virtual unsigned int getMemSize(void) const;
    virtual void Save(Base::Writer &/*writer*/) const;
    virtual void Restore(Base::XMLReader &/*reader*/);

    virtual PyObject *getPyObject(void);

    friend class Sketch;

public:
    ConstraintType Type;
    std::string Name;
    double Value;
    int First;
    PointPos FirstPos;
    int Second;
    PointPos SecondPos;
    int Third;
    PointPos ThirdPos;
    float LabelDistance;
    float LabelPosition;
};

} //namespace Sketcher


#endif // SKETCHER_CONSTRAINT_H
